“…Predators, in contrast, likely do not suffer from Na-deficits as their diet (other heterotrophs) is already rich in Na (Schowalter et al, 1981;Simpson et al, 2006;Kaspari et al, 2008). In fact, predators are generally insensitive to Na in choice tests (Bradshaw et al, 1996), but herbivores can taste and respond to Na even at concentrations as low as 0.005 M (Bell and Kitchell, 1966). Thus, Na bioaccumulates from plants to predators, but we know of no studies that compare Na-limitation among plant consumers and their predators in a given community.…”